Jonathan Strickland djanatyn

Rust Atomic Spinlock Analysis

Overview

This analysis shows how Rust atomic operations with different memory orderings (Acquire, Release, Relaxed) translate through LLVM IR to actual ARM64 assembly instructions.

Key Findings

1. Lock Acquisition (Acquire Ordering)

Rust Source:

when i'm biking i listen to music on my ipod (hacked to run rockbox), i like using last.fm so i record a scrobble.log file

i was going to upload the scrobbles but i noticed some of the dates were from before 2001

$ cat /mnt/.scrobbler.log
...
JPEGMAFIA EP2!  FEED HER! 6 176 L 1616925238     
Yuzo Koshiro  Actraiser Opening   131 S 946994845
...

So in Final Fantasy 14, you have a cute companion, a Chocobo! You can change the color of your Chocobo:

https://ffxiv.consolegameswiki.com/wiki/Chocobo_Colors

The default color of the chocobo is Desert Yellow. Players can change the color of their Chocobo by feeding them snacks...

The color value is tracked in RGB, so the default value (Desert Yellow) is 216/180/87.

Different fruit will change the Chocobo color in different ways:

Snack                  Effect                                                 R      G      B
---------------------  -----------------------------------------------------  -----  -----  -----

	function() {
	var e = document.getElementById("tt-px-url").value,
	l = document.getElementById("tt-el-url"),
	t = e.replace("https://nubela.co/proxycurl/api", ""),
	a = !1;
	if (0 !== t.indexOf("/linkedin/school/students"))
	for (var i = 0; i < o.length; i++) {
	var c = o[i];
	if (0 === t.indexOf(c)) {
	t = t.replace(c, n[c]), "/linkedin/company/employees/count" === c && (t = t.replace("linkedin_employee_count", "estimated_employee_count")), a = !0;

	-- https://xmonad.github.io/xmonad-docs/xmonad-contrib/XMonad-Actions-DynamicProjects.html
	myProjects :: [Project]
	myProjects =
	[ Project
	{ projectName = "chat",
	projectDirectory = "~/",
	projectStartHook = Just $ spawn "Discord"
	},
	Project
	{ projectName =

	use r2pipe::{R2Pipe, R2PipeSpawnOptions};

	/// Filename of GALE01 v1.02 GCM disk image.
	const SSBM_ISO: &str = "ssbm.iso";

	/// Filename of converted main.dol -> main.elf, converted with doltool.
	const MAIN_DOL: &str = "main.elf";

	/// Offset of get_rand_int in main.elf and in memory.
	///

	//! https://github.com/Rockbox/rockbox/blob/3c89adbdbdd036baf313786b0694632c8e7e2bb3/apps/plugins/lastfm_scrobbler.c#L29

	use chrono::{DateTime, TimeZone, Utc};
	use nom::{
	bytes::complete::take_until, character::complete::char, multi::count, sequence::terminated,
	IResult,
	};

	fn main() -> std::io::Result<()> {
	let log = std::fs::read_to_string("scrobbler.log")?;

	name: PlyPeach5K_Share_ACTION_AttackAirLw_figatree
	stroff: 97c
	animoff: 87f80
	unknown 0x8: 3681
	eventsoff: 55cc
	positionalFlags: 8
	charID: 900
	unknown0x14: 0
	48 (0x8d60):
	offset: 0x55cc

	[src/main.rs:284] (filter, file) = (
	Mimetype(
	"text/plain",
	),
	FileSnapshot {
	input_name: "/home/djanatyn/query.graphql",
	absolute_path: "/home/djanatyn/query.graphql",
	last_mtime: 1643587565,
	mimetype: "text/plain",
	},

	insertDate :: X ()
	insertDate = pasteString "<>"
	-- this is outputting ">>"!